Determine how many batteries you need in series, parallel, or both to meet your system voltage and capacity requirements. This calculator shows the required arrangement to match your target system.
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This guide covers series vs parallel fundamentals, string sizing math with worked examples, NEC 690. 7 temperature derating, mismatch rules, shade-aware strategies, DC wiring requirements, and how solar design software handles all of this automatically.
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A series connection links the positive terminal of one battery to the negative terminal of the next, increasing total voltage while keeping capacity constant.
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Once we've got that covered, I'll also explain the difference between these two configurations in Voltage (Volts) and Current (Amps) and provide a real-life example.
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